/*
 * Copyright 1999-2022 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.nacos.plugin.datasource.impl.oracle;

import com.alibaba.nacos.common.utils.CollectionUtils;
import com.alibaba.nacos.plugin.datasource.constants.DataSourceConstant;
import com.alibaba.nacos.plugin.datasource.mapper.ConfigInfoTagMapper;
import com.alibaba.nacos.plugin.datasource.model.MapperContext;
import com.alibaba.nacos.plugin.datasource.model.MapperResult;

/**
 * The mysql implementation of ConfigInfoTagMapper.
 *
 * @author hyx
 **/

public class ConfigInfoTagMapperByOracle extends AbstractMapperByOracle implements ConfigInfoTagMapper {

    @Override
    public MapperResult findAllConfigInfoTagForDumpAllFetchRows(MapperContext context) {
        String sql = "SELECT t.id, data_id, group_id, tenant_id, tag_id, app_name, content, md5, gmt_modified FROM ( "
                + "  SELECT id, ROW_NUMBER() OVER (ORDER BY id) AS rn "
                + "  FROM config_info_tag ) g "
                + "JOIN config_info_tag t ON g.id = t.id "
                + "WHERE rn BETWEEN ? AND ?";

        // Oracle的分页从1开始
        int startRow = context.getStartRow() + 1;
        int endRow = startRow + context.getPageSize() - 1;

        return new MapperResult(sql,
                CollectionUtils.list(startRow, endRow));
    }

    @Override
    public String getDataSource() {
        return DataSourceConstant.ORACLE;
    }
}
